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A003757 as a simple table

n a(n)
0 0
1 1
2 1
3 6
4 13
5 49
6 132
7 433
8 1261
9 3942
10 11809
11 36289
12 109824
13 335425
14 1018849
15 3104934
16 9443629
17 28756657
18 87504516
19 266383153
20 810723277
21 2467770054
22 7510988353
23 22861948801
24 69584925696
25 211799836801
26 644660351425

[0,1,1,6,13,49,132,433,1261,3942,11809,36289,
 109824,335425,1018849,3104934,9443629,28756657,
 87504516,266383153,810723277,2467770054,
 7510988353,22861948801,69584925696,211799836801,
 644660351425]

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Last modified March 29 05:48 EDT 2024. Contains 371265 sequences. (Running on oeis4.)